US4131898A - Interlacing recorder - Google Patents

Interlacing recorder Download PDF

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Publication number
US4131898A
US4131898A US05/833,579 US83357977A US4131898A US 4131898 A US4131898 A US 4131898A US 83357977 A US83357977 A US 83357977A US 4131898 A US4131898 A US 4131898A
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US
United States
Prior art keywords
jets
heads
print
print heads
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/833,579
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English (en)
Inventor
Rodger L. Gamblin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Mead Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mead Corp filed Critical Mead Corp
Priority to US05/833,579 priority Critical patent/US4131898A/en
Priority to NL7808315A priority patent/NL7808315A/xx
Priority to CA310,126A priority patent/CA1100565A/en
Priority to IT69020/78A priority patent/IT1160623B/it
Priority to JP53111215A priority patent/JPS5830821B2/ja
Priority to GB7836582A priority patent/GB2004717B/en
Priority to FR7826404A priority patent/FR2403193A1/fr
Priority to DE2840279A priority patent/DE2840279C2/de
Application granted granted Critical
Publication of US4131898A publication Critical patent/US4131898A/en
Assigned to EASTMAN KODAK COMPANY A NJ CORP. reassignment EASTMAN KODAK COMPANY A NJ CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MEAD CORPORATION THE A CORP. OF OH
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/5056—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements using dot arrays providing selective dot disposition modes, e.g. different dot densities for high speed and high-quality printing, array line selections for multi-pass printing, or dot shifts for character inclination
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/16—Special spacing mechanisms for circular, spiral, or diagonal-printing apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads

Definitions

  • This invention relates to jet drop printers which print graphic information upon a sheet mounted on a rotary support member.
  • one or more print heads are mounted above the sheet and advance axially as the sheet is rotated repetitively thereunder.
  • a typical recorder of this type is described in detail in Van Brimer et al U.S. Pat. No. 3,588,906.
  • each of which produces a single jet is joined together for common stepping in the axial direction, so that each jet prints a solid band of graphic information.
  • the printed bands grow continually wider until they join. Printing of a full image is then complete, and axial stepping is terminated.
  • Paranjpe et al solves most of the problems of the prior art.
  • a large number of spaced jets may be generated by a single head and printed in a spiral interlacing fashion.
  • the spacing between the jets should be such that it is equal to some number of image track widths which has no integer other than one as a factor in common with the number of nozzles.
  • the speed of axial advance should be so related to the speed of drum rotation that during one drum rotation each nozzle is advanced an axial distance equal to a number of track widths corresponding to the total number of nozzles. While this enables printing at high speed and high resolution, it requires a print head which produces a fairly large number of jets.
  • Such heads tend to be somewhat expensive because of quality control problems associated with production of the necessary components. For instance, it is relatively easy to manufacture a high quality orifice plate or a high quality charge ring plate for production of ten or fifteen jets. As the number of jets increases cumulative tolerance errors also increase and the percentage yield of satisfactory parts decreases substantially. This is an important factor in applications such as office copiers, wherein cost must be minimized.
  • Van Hook and Bruce disclose jet drop printers which produce a series of circumferentially spaced jets.
  • Bruce's jet producing nozzles are arranged in a single ring extending circumferentially around the printing drum, while Van Hook's nozzles are arranged in a plurality of rows.
  • Either of these devices requires a data system capable of producing relatively long switching delays corresponding to the time of drum rotation from the first to the last circumferentially spaced printing position.
  • This invention provides a high speed, high resolution ink jet recorder at moderate cost by combining a plurality of print heads of the type disclosed in Paranjpe et al, Ser. No. 789,417.
  • Each of the heads conforms to the teachings of Paranjpe et al but has a reduced number of jet forming components.
  • the overall number of jets produced by the plurality of heads provided in accordance with this invention may be the same as the number of jets produced by the single head of Paranjpe.
  • the heads preferably are all alike in the number of jets and in the jet spacing.
  • the spacing of jets within a head is selected to be a distance equal to a number of track widths having no factor other than one as a common factor with the number of jets produced by one of the heads.
  • the heads are spaced apart for interlacing of the printed bands produced by the different heads.
  • the heads are uniformly spaced along an axially extending line at a spacing equal to an integral number of axial advances.
  • One axial advance is the distance that each of the heads moves during one rotation of the drum, and this distance should be equal to the width of one printed track multiplied by the number of jets in one head.
  • each head prints a continually widening band which has unprinted tracks near the beginning edge but which is otherwise fully printed throughout. As each head completes its printed band it prints additional tracks, which extend across into the unprinted tracks near the edge of the adjacent band.
  • the end product is a large printed area produced by the cooperative effort of a plurality of print heads without any visually apparent seams.
  • FIG. 1 is a schematic illustration of a pair of print heads printing cooperatively in accordance with this invention.
  • FIG. 2 is a cross-sectional illustration of a print head.
  • FIG. 3 illustrates the geometrical relationship between two cooperatively operated print heads.
  • FIG. 4 illustrates the interlacing produced by two heads having five nozzles each.
  • FIG. 5 illustrates the interlacing produced by two print heads having four nozzles each.
  • jet drop printing is carried out by a plurality of print heads, each of which is constructed in accordance with the teachings of Paranjpe et al, Ser. No. 789,417, the details of which are fully described therein.
  • FIG. 1 illustrates two such print heads 10 & 11 mounted on an axially extending worm 23 for printing a sheet of paper 12.
  • Sheet 12 is mounted on a drum 13 driven by a drive motor 14. As described in the above mentioned Paranjpe et al application, worm 23 is rotated to cause axial advancing of the heads 10 in correct amount for each rotation of drum 13.
  • a vacuum belt system 15 delivers unprinted sheets to drum 13 and removes printed sheets therefrom upon completion of printing. It will be understood that paper handling is accomplished as taught by Paranjpe et al and elsewhere in the prior art.
  • a print head 10 (print head 11 being of identical construction) generally comprises an ink manifold 16, an orifice plate 17, a charge ring plate 18, a pair of deflection electrodes 19 and a catcher 21.
  • the operation of such a print head is well known as described in Paranjpe et al and other references mentioned therein. It is sufficient for the present purposes to note that print head 10 creates a row of jets 20, which are stimulated to break up into drops 22. Some of the drops 22 are charged by charge plate 18 for deflection by a deflection field established between plates 19. Drops which are so deflected are caught by the catcher 21, while drops which are uncharged and therefore undeflected deposit upon sheet 12.
  • Charge control signals for charge plate 18 may be generated by arrays of scanning photosensors as taught by Paranjpe et al or read from a magnetic tape as taught by Cahill et al 3,689,693.
  • FIG. 3 illustrates the cooperative printing action of the print heads 10 and 11.
  • each of heads 10 and 11 is shown as producing four jets 20.
  • the four jets produced by print head 10 print four helical bands designated by the letters s, t, u and v.
  • Similiarly print head 11 prints four helical bands w, x, y, and z.
  • Each of the printed bands has a width P, and the distance between adjacent bands is K.
  • the distance between heads 10 and 11 is S, and during one rotation of drum 13 the two print heads are transported along worm 23 a distance M.
  • each of print heads 10 and 11 is able to produce a solid printed image if the distance K is equal to a number of track widths having no factor other than one as a common factor with the number of jets produced by one of the heads.
  • the distance K expressed in terms of the track width P, must have no factor other than 1 as a common factor with the number 4.
  • the distance K may be 3P, 5P, 7P, 9P, 11P, etc.
  • Table I sets forth the permitted nozzle spacing for any number of nozzles from 2 through 9. It should also be noted that for proper operation the distance M should be equal to the distance P multiplied by the number of jets in one head. Thus for the configuration of FIG. 3 the distance M is equal to 4P.
  • cooperatively driven heads such as the print heads 10 and 11
  • the image comprises a series of printed dots 24 (illustrated with shading) printed by individual drops 22 generated by print head 10 and another series of printed dots 25 (illustrated without shading) printed by individual drops 22 produced by print head 11.
  • Printed dots 24 and 25 are arranged in a series of columns denoted by letters carrying numerical subscripts. In each case the letter corresponds to one of the track designations of FIG. 3 and the numerical subscript denotes the rotation of drum 13 during which the column was printed.
  • column w 1 is the column printed by track w during the first rotation of drum 13. It will be noted that there is a space equal to two track widths between column w 1 and column x 1 , the first column printed by track w.
  • the space between columns w 1 and x 1 is filled in by columns v n-1 and U n .
  • the subscript n refers to the nth or last rotation of the drum.
  • the space is printed by track v during the next to the last rotation of drum 13 and by track u during the last rotation of the drum.
  • track u is printing the column u n
  • track v is printing the column v n to fill in a blank column region between tracks w 2 and y 1 .
  • print heads 10 and 11 print image bands which adjoin in an interlaced fashion.
  • the printing illustrated in FIG. 5 is produced by a pair of print heads, each having four jet producing nozzles which are spaced apart by a distance equal to three track widths.
  • each such head is able to print a solid image (except at the edges) because the numbers 4 and 3 have no common factor other than 1.
  • the distance of print head advance during one revolution of drum 13 is equal to four times the width of one of the illustrated columns, and the separation between the print heads is equal to an integral number of such advance distances. For instance, if the diameter of a single printed dot is assumed to be 4 mils, then the advance distance M for the printing of FIG. 5 is equal to 16 mils, and the head separation distance S is equal to 16 mils times some integer, which might be a number in the order of about 312.
  • FIG. 4 illustrates interlace printing which is achieved by an alternative embodiment of the invention comprising two print heads, each having five jet producing nozzles spaced on centers two track widths apart. Again the printed spots are shaded and unshaded to represent printing by the two different heads. Also the printed columns are denoted by subscripted letters, with the letters a through e referring to five helical tracks produced by one head and the letters f through j indicating five helical tracks printed by the other head. Further in accordance with this invention the print heads for producing the image of FIG. 4 are mutually advanced a distance equal to five track widths during one revolution of the printing drum, and the head spacing is equal to an integral number of such advanced distances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
  • Advancing Webs (AREA)
US05/833,579 1977-09-15 1977-09-15 Interlacing recorder Expired - Lifetime US4131898A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US05/833,579 US4131898A (en) 1977-09-15 1977-09-15 Interlacing recorder
NL7808315A NL7808315A (nl) 1977-09-15 1978-08-09 Inktstraal-drukinrichting.
CA310,126A CA1100565A (en) 1977-09-15 1978-08-28 Interlacing recorder
IT69020/78A IT1160623B (it) 1977-09-15 1978-08-31 Apparecchio di stampa a getto di gocce d'inchiostro
JP53111215A JPS5830821B2 (ja) 1977-09-15 1978-09-09 インク・ジエツト・プリンタ−装置
GB7836582A GB2004717B (en) 1977-09-15 1978-09-13 Ink jet printers
FR7826404A FR2403193A1 (fr) 1977-09-15 1978-09-14 Appareil d'impression par gouttes d'encre pour copier ou reproduire des documents
DE2840279A DE2840279C2 (de) 1977-09-15 1978-09-15 Tintenstrahldrucker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/833,579 US4131898A (en) 1977-09-15 1977-09-15 Interlacing recorder

Publications (1)

Publication Number Publication Date
US4131898A true US4131898A (en) 1978-12-26

Family

ID=25264793

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/833,579 Expired - Lifetime US4131898A (en) 1977-09-15 1977-09-15 Interlacing recorder

Country Status (8)

Country Link
US (1) US4131898A (de)
JP (1) JPS5830821B2 (de)
CA (1) CA1100565A (de)
DE (1) DE2840279C2 (de)
FR (1) FR2403193A1 (de)
GB (1) GB2004717B (de)
IT (1) IT1160623B (de)
NL (1) NL7808315A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232324A (en) * 1978-06-05 1980-11-04 International Business Machines Corporation Apparatus for arranging scanning heads for interlacing
US4978971A (en) * 1989-11-06 1990-12-18 Tektronix, Inc. Method and apparatus for reformatting print data
US5079571A (en) * 1990-05-25 1992-01-07 Tektronix, Inc. Interlaced printing using spaced print arrays
EP0822089A2 (de) * 1996-07-30 1998-02-04 Canon Kabushiki Kaisha Mehrfach-Shuttledrucker
EP0822086A2 (de) * 1996-07-30 1998-02-04 Canon Kabushiki Kaisha Aufzeichnungsgerät und Gradationsaufzeichnungsverfahren in geteilten oder überlappenden Gebieten des Aufzeichnungsmediums
EP0779734A3 (de) * 1995-12-15 2001-03-28 Fuji Photo Film Co., Ltd. Verfahren zum zeilenweisen Drucken von vergrösserten oder verkleinerten Bildern
US6305780B1 (en) 2000-03-02 2001-10-23 Lexmark International, Inc. Carriage drive system for a serial printer which minimizes registration errors
US20030085977A1 (en) * 2001-10-09 2003-05-08 Fuji Photo Film Co., Ltd. Image recording method and apparatus
US20040130613A1 (en) * 2002-10-25 2004-07-08 Creo Inc. Method and and apparatus for imaging with multiple exposure heads
US20060139401A1 (en) * 2004-12-28 2006-06-29 Yung-Chuan Wu Ink jet printer
US7097278B1 (en) 1997-02-20 2006-08-29 Xaar Technology Limited Printer and method of printing
WO2011109955A1 (zh) * 2010-03-09 2011-09-15 北京中科纳新印刷技术有限公司 大幅面喷墨打印设备
ITRM20100306A1 (it) * 2010-06-05 2011-12-06 Metoda S P A Meccanismo di scrittura a più teste per stampante

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1202522A (en) * 1982-01-27 1986-04-01 Shou L. Hou Multi-jet single head ink jet printer
JPS5929241U (ja) * 1982-08-20 1984-02-23 三洋電機株式会社 インクジエツトプリンタ
JPS5970583A (ja) * 1982-10-15 1984-04-21 Toray Ind Inc インクジエツトプリンタのヘツド移動方法
JPS6288472A (ja) * 1985-10-14 1987-04-22 Sharp Corp フアクシミリの読取記録装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828355A (en) * 1972-09-23 1974-08-06 Agfa Gevaert Ag Continuous ink-jet recording
US4063254A (en) * 1976-06-28 1977-12-13 International Business Machines Corporation Multiple array printer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588906A (en) * 1968-10-18 1971-06-28 Mead Corp Image construction system with clocked information input
US3623122A (en) * 1970-06-04 1971-11-23 Horizons Research Inc Electric recording apparatus employing liquid developer
US3689693A (en) * 1970-11-17 1972-09-05 Mead Corp Multiple head ink drop graphic generator
US3925790A (en) * 1974-04-25 1975-12-09 Rca Corp Image generator having a plurality of marker units operated in a predetermined sequence to inhibit the formation of patterns
US4009332A (en) * 1976-06-28 1977-02-22 International Business Machines Corporation Memory management system for an ink jet copier
FR2356516A1 (fr) * 1976-06-28 1978-01-27 Ibm Systeme d'impression a elements d'impression
US4059183A (en) * 1976-12-30 1977-11-22 International Business Machines Corporation Dot matrix printer with slanted print head and modular skewing of dot pattern information
US4112469A (en) * 1977-04-21 1978-09-05 The Mead Corporation Jet drop copying apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828355A (en) * 1972-09-23 1974-08-06 Agfa Gevaert Ag Continuous ink-jet recording
US4063254A (en) * 1976-06-28 1977-12-13 International Business Machines Corporation Multiple array printer

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232324A (en) * 1978-06-05 1980-11-04 International Business Machines Corporation Apparatus for arranging scanning heads for interlacing
US4978971A (en) * 1989-11-06 1990-12-18 Tektronix, Inc. Method and apparatus for reformatting print data
US5079571A (en) * 1990-05-25 1992-01-07 Tektronix, Inc. Interlaced printing using spaced print arrays
EP0779734A3 (de) * 1995-12-15 2001-03-28 Fuji Photo Film Co., Ltd. Verfahren zum zeilenweisen Drucken von vergrösserten oder verkleinerten Bildern
EP0822089A2 (de) * 1996-07-30 1998-02-04 Canon Kabushiki Kaisha Mehrfach-Shuttledrucker
EP0822086A2 (de) * 1996-07-30 1998-02-04 Canon Kabushiki Kaisha Aufzeichnungsgerät und Gradationsaufzeichnungsverfahren in geteilten oder überlappenden Gebieten des Aufzeichnungsmediums
EP0822086A3 (de) * 1996-07-30 1998-06-24 Canon Kabushiki Kaisha Aufzeichnungsgerät und Gradationsaufzeichnungsverfahren in geteilten oder überlappenden Gebieten des Aufzeichnungsmediums
EP0822089A3 (de) * 1996-07-30 1999-06-16 Canon Kabushiki Kaisha Mehrfach-Shuttledrucker
US6095637A (en) * 1996-07-30 2000-08-01 Canon Kabushiki Kaisha Recording apparatus and method for gradation recording in divided or overlapped regions of a recording medium
US7097278B1 (en) 1997-02-20 2006-08-29 Xaar Technology Limited Printer and method of printing
US6305780B1 (en) 2000-03-02 2001-10-23 Lexmark International, Inc. Carriage drive system for a serial printer which minimizes registration errors
US20030085977A1 (en) * 2001-10-09 2003-05-08 Fuji Photo Film Co., Ltd. Image recording method and apparatus
US6938969B2 (en) * 2001-10-09 2005-09-06 Fuji Photo Film Co., Ltd. Image recording method and apparatus
US20040130613A1 (en) * 2002-10-25 2004-07-08 Creo Inc. Method and and apparatus for imaging with multiple exposure heads
US7256811B2 (en) * 2002-10-25 2007-08-14 Kodak Graphic Communications Canada Company Method and apparatus for imaging with multiple exposure heads
US20070216751A1 (en) * 2002-10-25 2007-09-20 To Derrick K Method and apparatus for imaging with multiple exposure heads
US7719556B2 (en) 2002-10-25 2010-05-18 Kodak Graphic Communications Canada Company Method and apparatus for imaging with multiple exposure heads
US20060139401A1 (en) * 2004-12-28 2006-06-29 Yung-Chuan Wu Ink jet printer
WO2011109955A1 (zh) * 2010-03-09 2011-09-15 北京中科纳新印刷技术有限公司 大幅面喷墨打印设备
ITRM20100306A1 (it) * 2010-06-05 2011-12-06 Metoda S P A Meccanismo di scrittura a più teste per stampante
EP2392462A1 (de) * 2010-06-05 2011-12-07 Metoda S.p.a. Druckverfahren durch einen Schreibmechanismus mit entweder einem Druckkopf mit mehreren Gruppen von nebeneinander angeordneten Schreibelementen oder einer Vielzahl nebeneinander angeordneter Druckköpfe

Also Published As

Publication number Publication date
FR2403193B1 (de) 1982-07-02
JPS5830821B2 (ja) 1983-07-01
NL7808315A (nl) 1979-03-19
IT1160623B (it) 1987-03-11
DE2840279A1 (de) 1979-03-29
GB2004717A (en) 1979-04-04
JPS5451836A (en) 1979-04-24
DE2840279C2 (de) 1982-06-24
CA1100565A (en) 1981-05-05
FR2403193A1 (fr) 1979-04-13
GB2004717B (en) 1982-03-03
IT7869020A0 (it) 1978-08-31

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EASTMAN KODAK COMPANY A NJ CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MEAD CORPORATION THE A CORP. OF OH;REEL/FRAME:004237/0482

Effective date: 19831206